Much of the Republican political establishment, many GOP voters and political analysts were telling Rick Santorum that the time had come for him to end his quest for his party's presidential nomination even before Tuesday when he failed to win any of three primaries.
Those calls had only increased by Wednesday as Santorum fell further behind Romney in the delegate count.
This NASA map shows the size of aerosol particles in the atmosphere. Green areas indicate larger, more naturally occurring particles like dust. Red areas indicate smaller aerosol particles, which can come from fossil fuels and fires. Yellow areas indicate a mix of large and small particles.
The "Taxi of Tomorrow" has arrived in New York City. On Tuesday night, officials unveiled the Nissan-designed cab that, over the next 10 years, will gradually replace the country's largest taxi fleet. It's the first New York taxi to be designed for the job since the city's iconic Checker cab.
For Nissan's designers, the process of putting the new cab together involved months of riding in taxis and talking to cab owners, drivers and passengers about what they did and didn't like.
Ambulances are parked outside the Mogadishu National Theatre on Wednesday after a suicide attack in the Somali capital. A young woman strapped with explosives blew herself up on at a ceremony in the Somali national theater attended by the prime minister and other officials.
The brains of people who grow up speaking two languages are wired differently, and those differences protect them from dementia as they age.
That's the news from two studies out this month from a scientist in Canada who has spent decades trying to figure out whether being bilingual is bad or good. "I've been doing this for 25 years," Ellen Bialystok, a distinguished research professor of psychology at York University in Toronto, tells Shots. "Suddenly people are interested. I figure it's because everybody's scared about dementia."